Most modern soda machines have little computers in them. The tiny RED LCD usually displays the data. The computer can be controlled by using certain buttons on the soda machine in different combinations. This can be used to check the temperature, see the amount of money (load and dump), and dump certain sodas. Will usually only work on newer machines that look like the one on the right. They need to have an LCD and also need to have some type of message on it ?ICE COLD SODAS? This tells you it is running something.

Sahaskatta